Hot valve



Nov. 3, 1931. T. w. STONE 1,829,768

HOT VALVE Filed March 15. 1929 4 Sheets-Sheet l INVENTOR.

Nov. 3, 1931. STONE 1,829,768

HOT VALVE Filed March 15, 1929 4 Sheets-Sheet 2 IN VEN TOR.

4 Sheets-Sheet 3 T. W. STONE HOT VALVE Filed March 15. 1929 MI Q vllllill'll l.

IN VEN TOR. flax/70514457606.

BY f 4 ATOEY.

Nov. 3, 1931.

Nov. 3, 1931. v T. w. STONE 1,829,763

HOT VALVE 7 Filed March 15. 1929 4 Sheets-Sheet 4 1 1- l I I 7 l LU lax v m f f m IN VEN TOR.

Patented Nov. 3,1931

"U D A ES PATENT OFFICE THOMAS w. STONE, or FORT WAYNE, IND ANA, AssIGNoR TO THE WESTERN GAS con:

' 's'rnucrrron COMPANY, A conroanmron or INDIANA nor ALV Application filed Karch is, 1929. Serial no. 347,272.

This invention relates to valves for handling gases in a highly-heated condition and relates mo're'specifically to valves adapted for the exacting conditions found in waterv gas generating plants.

' Such plants operate on an intermittent cycle. during one portion of which air is blown through a bed offuel to highly heat the fuel and during another portion of the o cycle steam is passed through the same bed of fuel to make blue gasor water gas. vEach time the operation .of'the gas generator changes from one portion of the cycleto another portion, several valves must necessarily '21.; be opened and closed. 1

The valve formingthe subjectmatter of this invention is intended primarily to be located on a waste heat boiler connection that conducts highly-heated gases during the air 2-0 blow period of the cycle to a waste heat boiler and cuts off the flow of water gas to the waste heat boiler during the gas making portion of thecfycle. i I f However, it is not intended that the use of the valve'be'limited to this one exact location, as with the many different arrangements of water-gas plants, other connections may require such a valve.

" A further object of the invention is to en- 3 tirely separate the action of a placement "mechanism that moves the double discs toor from a position obstructing the straightthrough opening of the valve from the action of a seating mechanism that presses thepe- 5 riphery of the discs against the seats of the valve with considerable force. Thatis, the seating can take place after the movement of the discs by the placement mechanism, for p way to the cylinder.

This mode of operation is diflerentquite all the way across the opening and then having the seating mechanism derive the power or motion that is required to bring the discs into firm contact with the seats from the final or remaining motion of the placement mechanism.

This complete separation of the placing and seating functions makes possible afur ther improvement in the operation of these water-gas plantyalves for'it permits the use of separate hydraulic cylinders or other sources of p'owerfor. the two functions and makes it possible to have safety interlocking devices that are exterior toand separate from the valve to prevent the placement and seating mechanisms from undergoing any simultaneous movements,

Thesafety interlock comprises one valve that is opened and closed by the placement mechanism and through which fluid that actuates the seating. mechanism passes on its It also comprises a second valve that is opened and closed by the seating mechanism and through. which'fluid must pass on its way to the cylinder that actuates the placement mechanism. This 'arrangement obviates the necessity of having mechanical interlocking means, or having elements that serve a double function, located within the casing of the double disc valve.

In the drawings, Figure 1 is an elevation in outline, showing the principal parts of a water-gas plant with the aforesaid valve placed in suitable relation to the rest of the plant; F 1

Fig. 2 is an elevation of the valve; Fig. 3 is a cross-section of a hydraulic cylinder shown in the upperleft-hand portion of Fig. 2-;

Fig. 4 is a hydraulic cylinder shown in the upper right-hand corner of Fig. 2;

Fig. 5 is a cross-section in plan view through the center of the two discs, showing them pressedtightly againsttheir seats in the main body of the valve; and

' fFig. 6is similar to'Fig. except that the two discs :are loose from their seats.- In Fig. 1- s a generator 1, a carburetter is shown at 2, a super-heater at 3, a waste heat boiler at4 and a tar batter or wash box at 5. V

- 2 and enlarged in Fig. 3, contains a piston A top gas oiitake 6-leadsfrom the generator to the carburetter and apipe 7 connects the carburetter to the super-heater. A wiaste I heat boiler connection 8 leads from the top of the super-heater to the boiler.

A back-run pipe 9 conducts down-run gases from generator 1 to thefwash box 5.. ,Apipe 10' conducts up run gases from the top of the isuper heater to the-wash box 5 which is f 5 provided with a v gas @main' connection 911'.

During theblow-periods of the cycle, the stack valve 12 is opened and a hydrauliccylf I "inder 13 is'provided for itsoperationfThe carbur'eter 2'isprovided withan Eoil'spray" 15 and-the generator 1 is provided with the usualcoaling door 16;

V j The valve which forms the subject mat;

ter of the,presentg'inventionis shown in Fig. '1. as a waste heat valve 20 located on the waste heat-boiler connection 8.' "Itis provided with a low pressure steam inlet line'21 and an outlet forthe steam at 22. Affvalve controls noperatedfby a hydraulicdcylinder 24. It is by -no means; essential, however, that the valve the entrance of the steamto valv e 2'O and is casing be provided cooling steam or ClT-r culat ngsteam f l; ent lating purposes and theseiilow -pressuredsteam connections 'are omittedfrom thevalve when it intended 4 for certain locations other than that suggested inFig.'1;: V I it Referring to :Fig. 2,-the largevalve casing 20 I is provided with a large straight-through f opening 25. adapted to be closed by discs 26.,

Fi e.

27, showm. in dotted lines; within 7 the lower portionofcasing '20 iThe discs 26,27 are mounted 'atftheinner end 28 of the-arm 29,

,the arm I29ihavin granexterior lever portion 30 that projects fromtheright-hand side of the casingasfshown in Fig. 2. The arm 29 is' pivoted at '31 and is operated bya hypdrauliccylinder32 anda wei'ght 33. V, T The inner .end28 of the arm 29'is-in the form of aring and surroundsbushings 34 and 35 shown in Figs; 5 and i 6 upporan the discs 26 31116121 3 1 p IA clean out 'door'36 provided at the bottom of "casing 20'.

YA hydraulic cylinder 40, shown atthe right 7 of Fig. .2 and also shownenlarged in Fig.4,

contains apiston 41 which actuates the piston rod42 that carries a conical wedge 43. v This wedge, shown in Figs." 5 and 6,'is capable of w ;-l wedging disc 26 away from, the disc; 27.

of the valve-so. as to prevent the wedge 43 Should there be an obstruction on the; seat i'roin, making itsnormal length of stroke, the

r s rin 44 located between iston41 and is- ...P .z P P ton rod 42 will prevent breakage. The piston rod 42 is provided witha stufling gland 46 and there is a secondary piston rod 4' 7 pr'ojecting from the opposite side of piston 41 which moves a visible signal 48 by means of an angular lever 49.

A cylinder 50, shown at the left of Fig.

51 which actuates a piston rod 52 carrying a wedge cone 53 on 1ts end that, as shown in Figs. 5'and '6,-a1ds wedge cone 43 111 ress ing the double discs 26,27 against their seats. .Anfob'struction'on the seats would not cause breakage, due to the presence of the spring '54 between piston 51 and piston rod 52.

; The two cones 43and 53"rOtate freely on the ends iof'piston,rodsf42 and 52, respec continuously around'discs 26" and 27' so as to make line COIltiLCtWlth the cones 43 and53.

- A secondary piston.ro'dfl57'projects from the side loi'piston 51'fopposite from red '52 and actuates a largeicross-head 58 by means of a button59 on the end of the pistonrod;

tect'ed parts of the valve discs 26 and 27,

A valvebody 60 contains piston valvejheads -61 pressed onto'an enlarged piston rod or plunger 62 on which 4 is-mounted cross-head 58. The member-'59; nearfthe' endiofits stroke, will contact witheithefr oftwo forks 63 and impart a small amount of motion to cross-head 58.- It should be noted that plunger 62-is reduced atone end to project throughc'ross-head 58 and at its other'en'd is reduced to have'pistonfvalve heads 61 pressed on. The portion bearing the valve heads61'has a small axial hole 64 drilled therethrough and moreover this axial hole 64 communicates with small cross drilled holes 65. A vent 66' prevents-trapping of water: at the right-hand end of piston heads ,2 t A valve body 70,shown in the lower righthand portion of Figl 2, Iis'provided with a long" valve stem 71.. V Adlai-r111? 2,1carriedby the piston rod ofcyl-inder 32 fand partaking of the movements of outer lever 30 of arm 29, slides up and down along valve stem and, when near each end'of its stroke, moves the'valve stem by means-ofstops 73 and 74. H The operation-of the valve proper is as follows? I 7 V In-order to close t-he valve, fluid :is passed to theupper'end of-cylinder 32,thereby depressing the outer end 30 of arm 29 and elevatingthe two discs 26, 27 to position opposite Ithe straightthrough u'op'ening '25. After this motionis completed, sep arate set of hydrauliccylindersJ40 and 50 press wedges 43 and 53m betweenthe' p'air'of discs,

spreading 'them :with' considerable- *force 7 tween the discs, allowing the discsto loosen' against the valve seats in the'interior' of main valve casing f z f To open the valve,'water is supplies simultaneously to theinnerendsof cylinders 40 and'sotemma' wedges .43. and 53 from be from their seats and beret'raoted toward each other sidewi'se: Afterthis movement iscompleted, water is's'upplied to'the bottom end of the cylinder32, raising the outer lever of arm 29 and moving the two discs edgewise into thebottom of casing 20'whereupon the time is as follows: I

'Af pipe 80 lead's'tofa distant automatic straight-through opening 25 *is entirely unobstructed.

7 The interlocking" mechanism necessary to bring "about the abovesequence of-m'otions and avoid breakageof parts by preventing botlr motions from taking place at the same control mechanism (not shown) and'branches intoa pipe 81 thatcommunicates with the top of cylinder 32 "an'd into a pipe 82 that connects with the outer ends ofcylinders 40 an 7 by means ofpipes85, 86 and87.

pipe 90, also connected to the-distant automatic control, leads to the inner ends of 7 cylinders 40' and 50 by means of pipes/Q91, 92

and 9 3. Pipe -90-also communicates with the j'bottom of cylinder 32 through pipes 92, 94 I and '95.

When the set of -pipes 80 to 87 are receiv- 1 ing pressure from the distant automatic coin trolfthe-set of pipes 90 to 95 act as exhaust. Jpipes. VVhen pipes 90t0 95 have pressure applied by the automatic control, the set of pipes 80 to 87 exhaust water back to theautomatic control. 1 I v Assume that the valve 20;is*to be closed and that high pressure is applied to'the pipe '80. This pipe divides into pipes 81 and 82 i but theipi'pe 82 is closed at valve 70 since this ing ofthe main double disc valve.

valve hasbeen closed by the previous open- Pressure through 81 passes to the'upper side of the piston in cylinder 32, depressing the pis ton, lowering lever '30 and elevating'arm 29 with the two discs edgewi'se into a position to obstruct the straight-through opening 25.

The water beneath the piston in 32 is not trapped for it can pass freely out through pipe 95 as valve is open at this time'and the'fluid exhausts through pipes 94, 92 and p 90 back to the automatic hydraulic control.

-When"cylinder"32 completes its stroke, arm

72 will engage stop73 on, the valve stem of valve and open the latter. The water in pipe 82 will then-flow through pipe 85 where it divides into pipes 86 and 87 I Pipe 86 leads to the outerendofc'ylinder 40 and the piston 41 presses wedge 43"between the discs. I

Pipe 87 is'connected to the outer endof cylinder 50 and-the wed'ge53is passed between the disc's. -:-When"wedge 53 and secondary piston are completing the end of their stroke, the valve 60 is closed This does not block the fluid flowing from the lower end of cylinder 32' because this cylinder has alreadycompleted its stroke and nomore fluid is flowing from pipe 95 to pipe 94. Movement of-the pistons in cylinders 40 and'50 has been possible because the inner end of cylinder50 communicates through pipes 93, 92 and 90 with the hydraulic control for exhaust purposes and the inner end of cylinder 40 come municates through pipes 91 and 90 with the automatic control for exhaust purposes. 3

When the hydraulic control is adjusted to open the double disc valve, pipe 80 becomes an exhaustfline and pressure is applied through pipe 90 to pipes 91 and 92. The cylinder 40 and piston 41 withdraw theconical wedge 43 and the pressure in pipe 92 extends through pipe 93 to the inner end of cylinder 50, thereby eifecting the withdrawal of wedge 53. While these cylinders are acting, pressure is also transmitted to pipe 94, but'has no effect because valve 60 under these circumstances is closed.

V and 95 andthe water flows through pipe 95 to'the bottom ofcylinder 32, elevating lever 30 andmovingthe double discs 26, 27 edge wise from the opening 25. At the end of the stroke of cylinder32, arm 7 2 engages stop? 4, elevating valve stem '71 and closing the valve 70. I 7

The closing of valve 7 Ofstops the exhaust ofcwater from pipes 87 and 86 through pipe 85*.to pipe 82, but thisdoes no harm since thecylinders 40 and 50 have already completed their strokes; Movement of the piston in cylinder 32 was possible, due to the fact that at its'upper end pipe 81- communicates with the pipe 80. so as to exhaust back to the hydraulic control. 7 i e p To avoid shock whenthe piston 41 approaches the end of its stroke atthe righthandend of cylinder 40, a cone 101 is carried atthe rightshazidsideof piston 41, as shown in Fig. 4, and enters the internal flange 102,

thereby establishing a restricted opening betweenthe surface of cone 101 and the edge "of flange 102. The farther the cone 101 travels' to the right, the smaller becomes the restricted opening, thereby throttling the water flowing to port 86- and decelerating the piston gradually at the right-hand end of its stroke. i V i I I. Should the cone 43 meet with some obstruction temporarily'till the piston 41 had com- .tached to the end ofthe inner endo'f plunger 42', which is provided with edges-1 that pass soclose to the inner surfaces of the member 104 as to establish arestricted'opening, would prevent the cone 43 from imparting any shock to the discs 26, 27 Thememberlfli by being rigidly attached to piston 41 also. forms a cage for the spring-44. 2

* Referring to Fig.13,"-the ais e mascara to the inner end ofpiston-ro'd 52- andtherinner surface of member": 111 establish aj re: strictedopening for the escaping ivatereX- actly corresponding to: disc 103- and member 10 i just described and preventcone 53, from f delivering any shock; The 1cone'105 and 1' fiang'e 106'slow down the piston 5l-atzthe left hand end of its stroke. ,-When' pressure is-reapplied through pipe 87, allthe w-ater,

coming from-87d'oes not-have to pass through the restricted opening to'initiatemo'vement of the piston 51, because the valve-107 held 7 to'its .seat bysprin'g 108, then lifts to. estab- "'lish communication through a large port 109.

1 parts 102 to 106, inclusive, are not the only breakage and; incorrect operation. Nearly all'partsofthedevme coact in some manner* The "restricted cr openings established, by

(portions of the device that tend .toprevent or are interconnected, with some distant part I so 7 the hydraulic cylinder connectedthereto 'unless the valveon? the supply pipe for: this cylinderhasbeenY opened by-Ia'lmeclianical' cries of thediscsatter the discs are in oh- 7 connection that leads to one ofthe wedges.

L- 'I- d 'i as my invention 1.j In a connection for a 'water g'as plant having a'valve with aJstraight-through openjing, valve seatsadjacent v the opening and double discs adaptedto obstruct the opening, flthe combination of a placement mechanism the placement andseatingmechanismsand for preventing operation of'theiseatingmech to- :m'o've the discs to or *trom'their' obstruct 'ing positions, a separate seating mechanism for pressing the discs againstthe: seatsafter the discs are positioned, said seating mechani'sm being mounted directly; on the valve and supported independently V of the placement mechanism" and an interlocking [device for preventing thesimulta-neous movement of toflobstruct the valve opening. 7-;

anism except when the discs are'iposition'ed 2. In "a'connection' for a water-gas,plant havingavalve' with a straight-through opening, valve seats adjacent the opening and double discs adapted to obstruct the opening,

the combinationof a placement mechanism cfor moving the discs to or from their obstructing-positions and a separate seating mechanism forpressing'the discs against the seats afterthe discs aretpositioned. said seatlng' mechanism being mounted directly on the placement mechanism, a hydraulic cylinder; for actuating the 1 placement mechanism, a pipe connected, to the hydraulic cylinder,

. a valve on the pipe opened'and closed by the seating mechanism, ,a second hydraulic cyl- "inder for actuating the seating mechanism,

a pipe connected to the second cylinder, and a valve on thelast-na'med pipe that is opened and closed. by movement of the positioning m chan m the valve and supported independently f; i

In a-connectionfor awater-gasfplant havinga valvewith .a straight-through opening, valve seats adjacent the opening and; double. discs, adapted to; :obstruct. the openingffithe kcombinationof a a placement ing' mechanism deriving its support entirely from the valve and saidseating mechanism comprising" hydraulic cylinders with piston rods arranged. radially with respect to said discs, the piston rods bearing wedges adapted itolenter betweenthe discs. M v

tIn a connection for awater-gas plant having valve "with a straight-through opening, valve seats adjacentthe opening and; double discs adapted toi obstruct -theopening,lthe combination of a, positioning hydraulic cylinder to move 'the;..,discs edgewise to or-from the obstructing position and adapted to -force wedges etween the periphstructing position, a control tubejleading to the positioning. hydraulic cylinder and a valve-on the control tubeopened and closed ayalve on the last named tube that is opened andclosed by movement of the discs to or from obstructing position. 7

a seating. mechanism capable'ot tightening the'discs against or"releasing thcm from the seats while the placement mechanism is at rest, an interlockinggdevice under'the'control of the seating mechanism to prevent movement of the positioning 7 mechanism and :an interlocking deviceiunder the control of the positioning mechanismitoprevent movement ot'the seating mechanism; a

' 6. :.In;.a-'connection zfor theated "gases in a water gas plant, tlie 'c ombinat'ion 'of'a valve with a s'traight-through opening, valve seats adjacent "the "opening and; double discs the movementnof-the wedges, a t 1 tube-leadin to the; wedging cylind i and entirely separate i-wedging cylinders, ar- I ranged radially with res ect to the discs and V v --11 0 -5. ln-a connection tor heated gases in ,a -.water-gasplant, the combination of a valve 7 at rest, an interlocking device under the con,- L

adapted to obstructthe opening, said valve having a placement mechanism for moving the discs to or from the obstructing position and a seating mechanism capable of'tightening the discs against orreleasing them from the seats while the; placement mechanism is,

trol of the-seating mechanism for preventing V movement of the positioning mechanism 110 while the discs are tight against the seats ;and a second interlocking device under the control of the positioning mechanism for preventing movement of the seatingmechanism in obstructing except when the discs are position.

'- .7. In a connection for a water-gas plant having a valve ,with a straight-through opening, valve seats adjacent the opening and double discsadapted to obstruct the opening, the combination'of a placement mechanism for moving the discs to or from obstructing position and an, independent seating mechanism for pressing the discs 1 against the seats after the discs are positioned, said seating mechanism comprising 1 hydraulic cylinders with piston rods arm ranged radially with respect to said discs,

the piston rods bearing conical wedges adapted to enter between the discs and the discs having circular ribs on their backs to receive the thrust of the conical Wedges.

8. Water-gas apparatus comprising a pipe having a valve opening, a gate valve of the 'double disc type having a reciprocating Gil mechanism connected to a central portion of said valve for placing the discs in a suitable '7 positlon'toobstruct sa d valve opening, and a second' rec1procat1ng mechanism for engaging edge portions of said discs to seat them against the valve interior after'they are in position.

l '9. Water-gas apparatus'comprising a pipe having an opening,.val've seats adjacent the Y opening and double discs adapted to close the opening, mechanism'for positioning the double discs across the opening and a second and separate mechanism movable at substantially right angles to the first mechanism for pressing the discs against the seats after the discs arepositioned. V

' 10. Water-gas apparatus comprising a valve having an opening, valve seats adjacent movingthe "discs to or from obstructing position and a separate-seating mechanism for pressing the discs against the seats after the discs are positioned, said seating mechanism the opening, double discs adapted vto obstruct v the opening, a placement mechanism for movmg the discs to or from obstructing pos1- tion and a separate seating mechanism for pressingthe discs againstthe seats after the discs are positioned, 'saidseating mechanism comprising movable Wedge members adapted, to force them apart by contact with their peripheries. 11. W ater-gas apparatus comprising a pipe having an opening, valve seats adjacent the opening, double discs adapted to obstruct the opening, a placement mechanism for 

